Add-On: Restrict Realtime Shipping Methods By Country

Hi everyone,

I've recently developed a new CS-Cart add-on which allows admins to restrict realtime shippings by country.
The initial problem was:
FedEx Ground shipping method should only be shown to customers from US. (The store is located in Canada)
You can use this add-on to do same trick with any other realtime shipping method.
Here is how the shipping method configuration page looks like:
There are no changes in core files, so there won't be any problems to install and maintain it (I mean CS-Carrt upgrades).
If you are interested in it please let me know.
I'm not publishing it at 1clue.com just because I'm not sure if anyone need it at all.
The price will be $29.